The fabrication of textile reinforced polymer composites requires the pre-forming of textiles over open, or within closed moulds before the introduction of the resin. This study is therefore concerned with the draping behavior of jute and glass fibres of various areal densities over double curvature moulds. Experimental investigation of the draping behavior was performed over a specially designed mould comprising different geometries of fillets and sharp edges. Simulation of the deformation... Topics: Fabrics, Textiles, Computational Modeling, Finite Elements, Draping Behavior
byYbarra, Gary A.; Wu, Shawkang M.; Bilbro, Griff L.; Ardalan, Sasan H.; Hearn, Chase P.; Neece, Robert T
An optimal signal processing algorithm is derived for estimating the time delay and amplitude of each scatterer reflection using a frequency-stepped CW system. The channel is assumed to be composed of abrupt changes in the reflection coefficient profile. The optimization technique is intended to maximize the target range resolution achievable from any set of frequency-stepped CW radar measurements made in such an environment. The algorithm is composed of an iterative two-step procedure. First,... Topics: CASCADE FLOW, STEADY FLOW, ITERATIVE SOLUTION, MATRICES (MATHEMATICS), SENSITIVITY, UNSTEADY FLOW,...
This graduate-level course is a continuation of Mathematical Methods for Engineers I (18.085). Topics include numerical methods; initial-value problems; network flows; and optimization. Topics: Scientific computing: Fast Fourier Transform, finite differences, finite elements, spectral method,...